Classification of composite modules

(1) Punching compound dies such as blanking and punching dies; cutting and punching dies;

(2) Forming compound dies such as bending compound dies and compound extrusion dies;

(3) Punching and forming composite dies such as blanking and drawing composite dies; punching and flanging composite dies; drawing and trimming composite dies; blanking, drawing, punching and flanging composite dies.

Key points of planning for composite molds

(1) There must be one (or several) convex and concave molds in the composite mold, and the convex and concave molds are the central parts of the composite mold. The precision of punching parts is higher than the precision of single process die punching, and the precision of general blanking parts can reach IT10 ~ IT11.

(2) The parts punched out by the compound die are pushed out from the die mouth, and the parts are relatively flat.

(3) The punching parts of the compound die are relatively complicated, and various tissues are set around the working part of the die, so its closing height is often high, and special attention should be paid when planning.

(4) The cost of the compound mold is high, and the production cycle is long, which is generally suitable for the production of large-scale stamping parts.

(5) When planning the composite mold, ensure the strength of the convex and concave molds, and pay special attention to the smaller wall thickness of the convex and concave molds. In order to add the strength of the male and female die and reduce the expansion force of the waste in the hole, you can choose to add the wall thickness below the effective cutting edge of the male and female die and eject the waste in the opposite direction, as shown in the figure on the right.

(6) There are many types of pusher equipment for the compound mold. When planning, it should be noted that the activities of the board and the push block should be sufficient, and the activities of the two should be the same. mm.

(7) There are many ways to apply the mold handle in the compound mold, such as press type, screw-in type, flange type, floating type, etc. can be selected. It should be ensured that the mold handle fits well into the mold base and has sufficient stability. , Can not reduce the strength of the mold handle because of the setting of the return structure, or increase the mold closing height too large [1].